3D printer

Abstract

The utility model discloses a 3D printer, and relates to the technical field of 3D printing, the 3D printer comprises a housing, a printing module and a cooling air supply system, the housing is provided with a printing space; the printing module is arranged in the printing space, the printing module comprises a nozzle, and the nozzle is used for extruding a printing material; the cooling air supply system comprises an airflow generator and an air supply part, the airflow generator is connected to the shell, the air supply part is connected to the printing module and provided with an annular space, the printing module penetrates through the annular space, the air supply part is provided with an air inlet and an air outlet, and the air inlet is communicated with the air outlet. The air inlet communicates with the output end of the airflow generator, and the air outlet is used for discharging air to the nozzle. According to the technical scheme provided by the utility model, the cooling noise is reduced, positive pressure cooling air is continuously provided for the molten material, and the cooling effect on the molten material is improved.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, and in particular to a 3D printer. Background Technology

[0002] In the field of 3D printing technology, after the extrusion equipment extrudes the printing material according to the printing requirements, the printing material needs to be rapidly cooled to fix its shape as quickly as possible to meet the printing needs. Existing 3D printers generally use cooling fans to cool the printing material.

[0003] However, in order to ensure the cooling speed, the cooling fan usually rotates very fast, which causes vibration and generates a lot of noise. This is not conducive to creating a comfortable operating environment for users, and it also affects the printing accuracy of the extrusion equipment, which is not good for the final printing effect. Utility Model Content

[0004] The main purpose of this invention is to propose a 3D printer that aims to reduce cooling noise, continuously provide positive pressure cooling air to the molten material, and improve the cooling effect on the molten material.

[0005] To achieve the above objectives, this utility model proposes a 3D printer, which includes:

[0006] A housing, wherein the housing is provided with a printing space;

[0007] A printing module, wherein the printing module is disposed within the printing space, the printing module including a nozzle for extruding printing material; and

[0008] A cooling air supply system includes an airflow generator and an air supply component. The airflow generator is connected to the housing, and the air supply component is connected to the printing module and has an annular space. The printing module passes through the annular space. The air supply component has an air inlet and an air outlet. The air inlet is connected to the output end of the airflow generator, and the air outlet is used to discharge air to the nozzle.

[0009] In one embodiment, the air supply component includes an air inlet pipe and an air outlet pipe connected at an angle. The air inlet pipe is provided with the air inlet and is connected to the output end of the airflow generator. The air outlet pipe is provided with the annular space and the air outlet.

[0010] In one embodiment, the air outlet duct includes at least two branch sections, which enclose the annular space, and each branch section is provided with at least one air outlet.

[0011] In one embodiment, the branch segment includes at least a first segment and a second segment connected at an angle, the second segment being located on the side of the first segment away from the air inlet duct, and the air outlet being located at the end of the second segment away from the first segment.

[0012] In one embodiment, the air outlet duct is arranged in a ring shape, and the air outlet includes multiple outlets, which are spaced apart in the air outlet duct.

[0013] And / or, the connection between the air inlet duct and the air outlet duct is a smooth transition.

[0014] In one embodiment, the cooling air supply system further includes a telescopic pipe, one end of which is connected to the output end of the airflow generator, and the other end of which is connected to the air supply component.

[0015] In one embodiment, the housing has a mounting bracket on the side facing away from the printing space, the airflow generator is mounted on the mounting bracket, the housing also has a through hole communicating with the printing space, and the telescopic tube passes through the through hole to connect the airflow generator and the air supply component.

[0016] In one embodiment, the cooling air supply system further includes a filter device located at the input or output end of the airflow generator for filtering the continuous positive pressure airflow provided by the airflow generator.

[0017] In one embodiment, the filtration device includes a mounting frame and a filter element. The mounting frame is connected to the airflow generator and encloses a fixed cavity and an inlet and an outlet communicating with the fixed cavity. The filter element is detachably disposed in the fixed cavity. The inlet is used to allow airflow to enter the filter element, and the outlet covers the input end of the airflow generator.

[0018] In one embodiment, the cooling air supply system further includes an electronic control device electrically connected to the airflow generator for controlling the operation of the airflow generator.

[0019] The air supply component in this invention has an air inlet and an air outlet. The air inlet of the air supply component is connected to the output end of the airflow generator. The printing module includes a nozzle, and the air outlet of the air supply component is positioned in the extrusion direction of the nozzle to cool the molten material extruded from the nozzle. The airflow generator provides a continuous positive pressure airflow to the air supply component, continuously cooling the molten material and ensuring effective cooling. Compared to traditional fan-based cooling methods, the airflow generator operates with less noise and provides stronger airflow, offering a more comfortable user environment. The air supply component has an annular space. When installing the cooling air supply system, the printing module passes through this annular space, allowing the air outlet of the air supply component to be close to the nozzle's extrusion outlet, thereby improving the cooling efficiency of the molten material. The airflow generator and the air supply component are separate components; the airflow generator is mounted on the housing, and the air supply component is mounted on the printing module. During printing, only the air supply component moves with the printing module, and the vibration generated by the airflow generator is not transmitted to the printing module. This reduces the impact of the cooling air supply system on the control accuracy of the printing module and improves the printing accuracy of the printing module. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the cooling air supply system in one embodiment of this utility model;

[0022] Figure 2 A schematic diagram of the installation structure of the air supply component in one embodiment of this utility model.

[0023] Explanation of icon numbers:

[0024] 100. Cooling air supply system; 1. Airflow generator; 2. Air supply component; 21. Air inlet duct; 211. Air inlet; 22. Air outlet duct; 221. Branch section; 2211. First section; 2212. Second section; 2213. Air outlet; 23. Annular space; 3. Telescopic pipe; 4. Filter device; 5. Electrical control device; 6. Printing module; 61. Nozzle.

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0027] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] Please refer to the reference. Figure 1 and Figure 2 As shown in the figure, this utility model embodiment proposes a 3D printer, which includes a housing, a printing module 6, and a cooling air supply system 100. The housing has a printing space; the printing module 6 is disposed in the printing space and includes a nozzle 61 for extruding printing material; the cooling air supply system 100 includes an airflow generator 1 and an air supply component 2. The airflow generator 1 is connected to the housing, and the air supply component 2 is connected to the printing module 6 and has an annular space 23. The printing module 6 passes through the annular space 23. The air supply component 2 has an air inlet 211 and an air outlet 2213. The air inlet 211 is connected to the output end of the airflow generator 1, and the air outlet 2213 is used to discharge air to the nozzle to cool the printing material.

[0030] Understandably, the housing serves as the support structure for the 3D printer, and both the heated bed mechanism and the printing module 6 are mounted on the housing and located within the printing space. The heated bed mechanism has a printing plane, and the printing module 6 extrudes molten material onto the printing plane through the extrusion port of the nozzle 61. After cooling and solidification, the printed part is formed.

[0031] In this embodiment, the air supply component 2 is provided with an air inlet 211 and an air outlet 2213. The air inlet 211 of the air supply component 2 is connected to the output end of the airflow generator 1, and the air outlet 2213 of the air supply component 2 is arranged in the extrusion direction of the nozzle 61 to cool the molten material extruded by the nozzle 61. The airflow generator 1 provides a continuous positive pressure airflow to the air supply component 2 to continuously cool the molten material, ensuring the cooling effect on the molten material. The airflow generator 1 has low noise during operation and provides a gentler airflow, providing a comfortable user environment. The air supply component 2 is provided with an annular space 23. When the cooling air supply system 100 is installed, the printing module 6 passes through the annular space 23 so that the air outlet 2213 of the air supply component 2 can be set close to the extrusion port of the nozzle 61, thereby improving the cooling efficiency of the molten material. The airflow generator 1 can be an air pump, a centrifugal fan, a turbo fan, a blower, or other components that can generate airflow and create an air pressure difference. The airflow generator 1 is used to generate positive air pressure and airflow, and can generate a continuous air pressure difference at the air outlet 2213 of the air supply component 2, which helps to improve the cooling effect on the printing material during the printing process.

[0032] Meanwhile, the airflow generator 1 and the air supply component 2 are set separately. The airflow generator 1 is installed at the housing, and the air supply component 2 is installed at the printing module 6. During printing, only the air supply component 2 moves with the printing module 6. The vibration generated by the airflow generator 1 will not be transmitted to the printing module 6. This reduces the impact of the cooling air supply system 100 on the control accuracy of the printing module 6 and improves the printing accuracy of the printing module 6.

[0033] Optionally, a silencer can be installed at the output end of the airflow generator 1. The positive pressure airflow is transmitted to the air supply component 2 after passing through the silencer, which can further reduce the noise of the airflow generator 1 and reduce noise pollution to the surrounding environment. The air supply component 2 can be made of plastic.

[0034] In practical implementation, the printing space can be a relatively enclosed space during printing. The airflow generator 1 can be located inside or outside the printing space, without specific limitations. In one embodiment, the printing mechanism includes a sliding device and a printing module 6. The printing module 6 is connected to the output end of the sliding device. During printing, the sliding device drives the printing module 6 to move along the printing plane. The air supply component 2 can also be connected to the output end of the sliding device and does not directly contact the printing module 6. This can reduce the damage to the air supply component 2 caused by the high temperature of the printing module 6 during operation and extend the service life of the air supply component 2.

[0035] In one embodiment of this utility model, such as Figure 1 and Figure 2 As shown, the air supply component 2 includes an air inlet duct 21 and an air outlet duct 22 connected at an angle. The air inlet duct 21 is provided with an air inlet 211 and is connected to the output end of the airflow generator 1. The air outlet duct 22 is provided with an annular space 23 and an air outlet 2213.

[0036] In this embodiment, the air inlet duct 21 and the air outlet duct 22 are arranged at an angle. The air inlet duct 21 is provided with an air inlet 211, which is connected to the output end of the airflow generator 1 through a connecting pipe. It is understood that, in order to facilitate the arrangement of the connecting pipe and avoid the connecting pipe interfering with the normal printing of the printing module 6, the connecting pipe is connected to the air inlet duct 21 from the side of the printing module 6 facing away from the printing plane. Therefore, the air inlet duct 21 is arranged along the extension direction of the printing module 6, and the air inlet 211 is located at the end of the air inlet duct 21 away from the heated bed mechanism, so as to facilitate the connection between the air inlet duct 21 and the airflow generator 1. The air outlet duct 22 extends towards the extrusion port of the nozzle 61, so that the air outlet 2213 is directly facing the molten material ejected from the nozzle 61, thereby improving the cooling efficiency and cooling effect of the cooling air supply system 100.

[0037] In actual implementation, the extension direction of the printing module 6 is set perpendicular to the printing plane, and the air inlet duct 21 can also be set roughly parallel to the extension direction of the printing module 6 to facilitate connection with the printing module 6, and at the same time facilitate connection with the airflow generator 1 from the end away from the printing plane; the air outlet duct 22 can be set parallel to the printing plane or at an angle to the printing plane, and the lowest point of the air outlet duct 22 does not exceed the plane where the nozzle 61 extrusion port is located to avoid collision with the printing plane during printing.

[0038] Understandably, the air outlet 2213 is not positioned directly opposite the nozzle 61, but rather below the nozzle 61, blowing air directly onto the surface of the molten material just extruded from the nozzle 61 to cool it. This avoids affecting the extrusion effect of the nozzle 61 and simultaneously allows the extruded molten material to cool rapidly, ensuring printing accuracy. The air supply component 2 can be integrally molded.

[0039] In one embodiment of this utility model, such as Figure 1 and Figure 2 As shown, the air outlet duct 22 includes at least two branch sections 221, which enclose an annular space 23. Each branch section 221 is provided with at least one air outlet 2213.

[0040] In this embodiment, two branch segments 221 enclose an annular space 23 for the printing module 6 to pass through. The two branch segments 221 are not connected at the end away from the air inlet duct 21, that is, the annular space 23 formed by the two branch segments 221 has a gap, so as to facilitate the installation of the printing module 6 in the printing space. It can be understood that the setting of the gap can reduce the obstruction of the air outlet to the travel of the printing module 6 and reduce the restriction of the cooling air supply system 100 on the printing module 6.

[0041] In actual implementation, the two branch sections 221 are symmetrically extended on both sides of the printing module 6, and the air outlets 2213 of the branch sections 221 are also symmetrically arranged to ensure the uniformity of airflow to the molten material and improve the cooling effect of the molten material.

[0042] Optionally, the air outlet 2213 is located at the end of the branch section 221 away from the air inlet duct 21, and the nozzle 61 is located within the notch, so that the air outlet 2213 is positioned directly below the nozzle 61. The air outlet duct 22 also includes a main section connected to the air inlet duct 21, and the branch section 221 is connected to the side of the main section facing away from the air inlet duct 21. The main section diverts the positive pressure airflow entering from the air inlet duct 21 to each branch section 221. Furthermore, the corners of the air inlet duct 21, the main section, and the branch section 221 are all rounded to reduce the resistance of the positive pressure airflow transmission within the air supply component 2 and improve the cooling effect of the cooling air supply system 100.

[0043] In one embodiment of this utility model, such as Figure 2 As shown, the branch segment 221 includes at least a first segment 2211 and a second segment 2212 connected at an angle. The second segment 2212 is located on the side of the first segment 2211 away from the second segment 2212, and an air outlet 2213 is provided at the end of the second segment 2212 away from the first segment 2211.

[0044] Understandably, the air inlet duct 21 is generally located on one side of the printing module 6. In this embodiment, the branch segment 221 includes a first segment 2211 and a second segment 2212. The first segment 2211 extends from the air inlet duct 21 away from the printing module 6, and the second segment 2212 extends from the first segment 2211 towards the printing module 6. This avoids the main body of the printing module 6 and makes the air outlet 2213 close to the extrusion port of the nozzle 61.

[0045] In actual implementation, the branch segment 221 can be set in three segments, four segments, or an arc shape, without specific limitations. On the projection perpendicular to the printing direction of the printing module 6, the annular space 23 can be set in approximately a rhombus, rectangle, circle, or ellipse, without specific limitations.

[0046] In one embodiment of this utility model, such as Figure 1 and Figure 2 As shown, the air outlet duct 22 is arranged in a ring shape, and there are multiple air outlets 2213, which are spaced apart in the air outlet duct 22.

[0047] In this embodiment, the air outlet duct 22 is arranged in a ring shape, and the air outlets 2213 are spaced apart along the air outlet duct 22 to further improve the uniformity of airflow to the molten material and ensure the cooling effect on the molten material. The air outlets 2213 can be evenly spaced on the air outlet duct 22. Multiple air outlets 2213 are all arranged facing downwards from the nozzle 61 to cool the molten material from different directions and improve cooling efficiency.

[0048] In one embodiment of this invention, the connection between the air inlet pipe 21 and the air outlet pipe 22 is a smooth transition. This reduces the resistance of the positive pressure airflow from the air inlet pipe 21 to the air outlet pipe 22, reduces the noise of the positive pressure airflow during the conveying process, improves the air delivery efficiency of the air supply component 2, and ensures the cooling efficiency of the molten material.

[0049] In one embodiment of this utility model, such as Figure 1 As shown, the cooling air supply system 100 also includes a telescopic pipe 3, one end of which is connected to the output end of the airflow generator 1, and the other end of which is connected to the air supply component 2. The telescopic pipe 3 can be a flexible hose.

[0050] In this embodiment, the air supply component 2 and the airflow generator 1 are connected by a telescopic tube 3. During printing, the air supply component 2 moves with the printing module 6, and the telescopic tube 3 automatically adapts to the distance between the air supply component 2 and the airflow generator 1, exhibiting high flexibility. It can be understood that the telescopic tube 3 serves as the connecting tube between the airflow generator 1 and the air supply component 2. This effectively avoids a redundant connecting tube between the airflow generator 1 and the air supply component 2, preventing the connecting tube from sagging and affecting the normal forming of the printed parts.

[0051] In actual implementation, the diameter of the end of the air inlet duct 21 near the air inlet 211 is the same as the inner diameter of the telescopic pipe 3. The telescopic pipe 3 can be sleeved on the air inlet duct 21 and tightened with clamps to connect the telescopic pipe 3 to the air supply component 2. Similarly, the diameter of the output end of the airflow generator 1 is also the same as the inner diameter of the telescopic pipe 3. The telescopic pipe 3 is sleeved on the output end of the airflow generator 1 and tightened with clamps to connect the telescopic pipe 3 to the airflow generator 1.

[0052] In one embodiment of this utility model, such as Figure 1 As shown, a mounting bracket is provided on the side of the housing facing away from the printing space. The airflow generator 1 is mounted on the mounting bracket. The housing is also provided with a through hole that connects to the printing space. The telescopic tube 3 passes through the through hole to connect the airflow generator 1 and the air supply component 2.

[0053] In this embodiment, the airflow generator 1 is disposed outside the printing space, and a mounting bracket is provided on the housing outside the printing space. The airflow generator 1 is fixed to the housing by the mounting bracket. The housing has a through hole for the telescopic tube 3 to pass through, so that the airflow generator 1 in the printing space can communicate with the air supply component 2 in the printing space. The mounting bracket also has a mounting cavity, which is matched in size to the airflow generator 1 to position and limit the airflow generator 1, so as to avoid excessive vibration of the airflow generator 1 during operation.

[0054] Understandably, when the 3D printer is running, both the heated bed mechanism and the printing module 6 will heat up, so the temperature outside the printing space will be lower than the temperature inside the printing space. The airflow generator 1 sends the cooler air outside the printing space into the air supply component 2, which can improve the cooling efficiency of the cooling air supply system 100 on the molten material.

[0055] In actual implementation, the mounting bracket is set on the back of the housing through a quick-release structure. Correspondingly, the telescopic tube 3 also extends into the printing space from the back of the housing. This is beneficial to the aesthetics of the 3D printer and also makes it easier to connect the airflow generator 1 to the electrical control system of the 3D printer.

[0056] In one embodiment of this utility model, such as Figure 1 As shown, the cooling air supply system 100 also includes a filter device 4, which is located at the input or output end of the airflow generator 1 and is used to filter the continuous positive pressure airflow provided by the airflow generator 1.

[0057] In this embodiment, the filter device 4 is used to filter the positive pressure airflow sent into the air supply component 2 by the airflow generator 1, so as to prevent dust or other foreign objects from being sprayed out from the air outlet 2213 along with the positive pressure airflow, adhering to the surface of the printed part, and affecting the printing quality of the 3D printer.

[0058] In practical implementation, the filter device 4 can be installed at the input end of the airflow generator 1, i.e., the air inlet of the airflow generator 1, or at the output end of the airflow generator 1, i.e., the air outlet of the airflow generator 1. Both methods can filter the positive pressure airflow sent into the air supply component 2 to ensure the quality of the printed parts. In some embodiments, the filter device 4 can also be set at the end of the telescopic tube 3 or at the air inlet 211 of the air supply component 2.

[0059] In one embodiment of this utility model, such as Figure 1As shown, the filter device 4 includes a fixed frame and a filter element. The fixed frame is connected to the airflow generator 1 and encloses a fixed cavity and an inlet and an outlet that connect the fixed cavity. The filter element is detachably disposed in the fixed cavity. The inlet is used to allow airflow to enter the filter element, and the outlet is covered by the input end of the airflow generator 1.

[0060] In this embodiment, the filter device 4 is disposed at the input end of the airflow generator 1. The filter element can be filter cotton or filter mesh, etc. The filter element is covered by a fixing bracket at the input end of the airflow generator 1 to filter the airflow pumped in by the airflow generator 1. When the cooling air supply system 100 is running, the airflow enters through the inlet of the fixing bracket, is filtered by the filter element, and then enters the input end of the airflow generator 1 through the outlet, and is then pumped into the air supply component 2 by the airflow generator 1.

[0061] In actual implementation, the mounting bracket is connected to the airflow generator 1 or the mounting bracket on which the airflow generator 1 is installed via a quick-release structure to facilitate the installation and removal of the filter device 4. The mounting bracket may include two detachably connected housing parts, with the filter element positioned between the two housing parts to facilitate the replacement of the filter element.

[0062] In one embodiment of this utility model, such as Figure 1 As shown, the cooling air supply system 100 also includes an electronic control device 5, which is electrically connected to the airflow generator 1 and is used to control the operation of the airflow generator 1.

[0063] In this embodiment, the operating power of the airflow generator 1 can be controlled by the electronic control device 5, and the user can adjust the airflow power of the cooling air supply system 100 according to actual printing needs. The electronic control device 5 can be integrated onto a circuit board, which can be mounted on the mounting bracket that fixes the airflow generator 1 and connected to the control system of the 3D printer. The user can control the operating status of the airflow generator 1 through the control panel of the 3D printer, such as whether the cooling air supply system 100 starts cooling and the airflow strength of the cooling air supply system 100.

[0064] In actual implementation, an air pressure sensor can also be installed at the output end of the airflow generator 1. The air pressure sensor is used to monitor whether the positive pressure airflow of the cooling air supply system 100 is normal. The air pressure sensor is electrically connected to the electronic control device 5. The air pressure sensor transmits the air pressure of the positive pressure airflow to the electronic control device 5. The electronic control device 5 can determine whether the air pressure of the positive pressure airflow is within the preset range, so as to determine whether the airflow generator 1, the air supply component 2 or the connecting pipe is normal. If the air pressure of the positive pressure airflow is not within the preset range, the electronic control device 5 will issue an alarm to the user so that the user can troubleshoot the fault in time and avoid affecting the printing quality.

[0065] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A 3D printer, characterized by, The 3D printer comprises: a housing provided with a printing space; a printing module provided in the printing space, the printing module comprising a nozzle for extruding printing material; and a cooling air supply system comprising an air flow generator connected to the housing and an air supply member connected to the printing module and provided with an annular space in which the printing module is arranged, the air supply member being provided with an air inlet and an air outlet, the air inlet being in communication with the output end of the air flow generator, and the air outlet being configured to supply air to the nozzle.

2. The 3D printer of claim 1, wherein, The air supply member comprises an air inlet pipe and an air outlet pipe connected at an angle, the air inlet pipe being provided with the air inlet and connected to the output end of the air flow generator, and the air outlet pipe being provided with the annular space and the air outlet.

3. The 3D printer of claim 2, wherein, The air outlet pipe comprises at least two branch sections, the two branch sections enclosing the annular space, and each branch section being provided with at least one air outlet.

4. The 3D printer of claim 3, wherein, The branch sections comprise at least a first section and a second section connected at an angle, the second section being arranged on the side of the first section away from the air inlet pipe, and the second section being provided with the air outlet at the end thereof away from the first section.

5. The 3D printer of claim 2, wherein, The air outlet pipe is arranged in a ring shape, and the air outlet comprises a plurality of air outlets arranged at intervals on the air outlet pipe. The connection between the air inlet pipe and the air outlet pipe is smoothly transitioned.

6. The 3D printer according to any one of claims 1 to 5, wherein, The cooling air supply system further comprises an extension pipe, one end of the extension pipe being connected to the output end of the air flow generator, and the other end of the extension pipe being connected to the air supply member.

7. The 3D printer of claim 6, wherein, The housing is provided with a mounting rack on the side thereof away from the printing space, the air flow generator being mounted on the mounting rack, and the housing is further provided with a through hole in communication with the printing space, the extension pipe being arranged through the through hole to connect the air flow generator and the air supply member.

8. The 3D printer of any one of claims 1 to 5, wherein, The cooling air supply system further comprises a filter device, the filter device being arranged at the input end or the output end of the air flow generator and configured to filter the continuous positive pressure air flow provided by the air flow generator.

9. The 3D printer of claim 8, wherein, The filter device comprises a fixing rack and a filter member, the fixing rack being connected to the air flow generator and enclosing a fixing cavity and an inlet and an outlet in communication with the fixing cavity, the filter member being detachably arranged in the fixing cavity, the inlet being configured to allow air flow to enter the filter member, and the outlet being configured to cover the input end of the air flow generator.

10. The 3D printer of any one of claims 1 to 5, wherein, The cooling air supply system further comprises an electric control device electrically connected to the air flow generator and configured to control the operation of the air flow generator.

Images